That's my own unscientific impression as well: that a good number (most?) of the fans who have issues with the movie are of the TNG generation, as opposed to us old-school TOS types. And, yes, I've grumbled in the past about people applying to "TNG standards" to a movie based on TOS.

Also the Treknical fans. Those for whom Trek is about starship design and stardates lining up and technobabble over the stories themselves.

Of course. Imagine having to start your Galactic Encyclopedia over at page one when you've been religiously scribbling into it every day since 1987.

Why, you'd feel that much of your life has bordered on the ridiculous.